GATE CSE · 2025 · CS
Question 55: Computer Organization and Architecture
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Question 55
CSNAT2 marksNeeds review
Given a computing system with two levels of cache (L1 and L2) and a main memory. The first level (L1) cache access time is 1 nanosecond (ns) and the “hit rate” for L1 cache is 90% while the processor is accessing the data from L1 cache. Whereas, for the second level (L2) cache, the “hit rate” is 80% and the “miss penalty” for transferring data from L2 cache to L1 cache is 10 ns. The “miss penalty” for the data to be transferred from main memory to L2 cache is 100 ns.
Then the average memory access time in this system in nanoseconds is __________. (rounded off to one decimal place)
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2025CS
GATE CSE 2025 · Paper 2
Computer Science and Information Technology · Original paper archive
- Section
- Computer Science and Information Technology
- Question type
- Numerical answer (NAT)
- Marks
- 2 marks
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